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Data as of Nov 9, 2026

144.121.32.0/21

No anonymizer space · no proxy exits in 30 days

Crown Castle Fiber LLC · space held by Zayo Bandwidth

Announcement
this exact prefix
No RPKI
Announced by
AS46887
Type
Internet provider
Risk
0 / 100 · Low

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
144.121.0.0/18
since Aug 2016
AS46887Internet provider16
3 always on
Zayo Bandwidth
144.121.0.0/16
since Nov 2021
AS46887Internet provider132
25 always on
Zayo Bandwidth

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
144.121.0.0/1665,536ZAYO-CCF-144-121-0-0Zayo Bandwidth (ZAYOB) · USDirect AllocationApr 29, 2016abuse@zayo.com
└ 144.121.32.32/2732NET-144-121-32-32-27unknown———
└ 144.121.32.128/2816NET-144-121-32-128-28unknown———
└ 144.121.32.144/298NET-144-121-32-144-29unknown———
└ 144.121.32.160/2732NET-144-121-32-160-27unknown———
└ 144.121.32.192/2816NET-144-121-32-192-28unknown———
└ 144.121.32.240/298NET-LT-403-144-121-32-240-29unknown———
└ 144.121.33.0/24256NET-144-121-33-0-24unknown———
└ 144.121.34.24/298NET-144-121-34-24-29unknown———
└ 144.121.34.48/298LTF--144-121-34-48-29unknown———
└ 144.121.34.112/2816NET-LT-803-144-121-34-112-28unknown———
└ 144.121.34.216/298NET-144-121-34-216-29unknown———
└ 144.121.34.232/298NET-144-121-34-232-29unknown———
└ 144.121.34.248/298NET-144-121-34-248-29unknown———
└ 144.121.36.16/2816NET-144-121-36-16-28unknown———
└ 144.121.36.64/2816NET-144-121-36-64-28unknown———
└ 144.121.37.8/298NET-144-121-37-8-29unknown———
└ 144.121.37.32/2732NET-144-121-37-32-27unknown———
└ 144.121.37.64/2732NET-144-121-37-64-27unknown———
└ 144.121.37.128/25128NET-144-121-37-128-25unknown———
└ 144.121.38.8/298NET-144-121-38-8-29unknown———
└ 144.121.38.84/304NET-SD-50292-144-121-38-84-30unknown———
└ 144.121.38.112/2816NET-144-121-38-112-28unknown———
└ 144.121.38.200/298NET-144-121-38-200-29unknown———
└ 144.121.39.0/2816LTF--144-121-39-0-28unknown———
└ 144.121.39.16/298NET-144-121-39-16-29unknown———
└ 144.121.39.32/298NET-144-121-39-32-29unknown———
└ 144.121.39.64/2816NET-144-121-39-64-28unknown———
└ 144.121.39.128/298NET-144-121-39-128-29unknown———
└ 144.121.39.160/298NET-144-121-39-160-29unknown———
└ 144.121.39.176/2816NET-144-121-39-176-28unknown———
└ 144.121.39.224/298NET-144-121-39-224-29unknown———

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS46887

US
Name
Crown Castle Fiber LLC
Type
Internet provider
Registered
Apr 13, 2009
Domain
zayo.com
Website
www.crowncastle.com/
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed